US design patent No. 31,110 granted to Isaac E. Palmer of Middletown, Connecticut, for a fabric design. The fabric has warp threads in groups of three, where the two outer threads cross each other at intervals (as in leno or gauze) and a straight central thread runs between them. Single weft threads pass between the central and outer threads. The patent has a drawing sheet with two views (Fig. 1 and Fig. 2) showing the two sides of the fabric, and a one-page specification with a single claim.